The coffee rust disease was first discovered in Africa in the late 1800s. It was characterized by yellow rust-like spots found in the leaves of the coffee plants. Back then, the farmers didn’t have any idea on what this disease was.
After a couple of decades, they learned that the coffee rust disease is caused by a fungus called Hemileia vastatrix. The outbreak of this devastating disease killed the coffee industry for years! Though fungicides can partially control the effects, they weren’t completely able to get rid of the harmful effects of the disease to coffee plants.